mirror of
https://github.com/RangeNetworks/openbts.git
synced 2025-11-03 21:33:15 +00:00
146 lines
3.5 KiB
C++
146 lines
3.5 KiB
C++
/*
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* Copyright 2008, 2009 Free Software Foundation, Inc.
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*
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* This use of this software may be subject to additional restrictions.
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* See the LEGAL file in the main directory for details.
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* This software is distributed under multiple licenses; see the COPYING file in the main directory for licensing information for this specific distribuion.
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*/
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#include "GSMTAPDump.h"
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#include "GSMTransfer.h"
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#include <Sockets.h>
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#include <Globals.h>
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UDPSocket GSMTAPSocket;
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void gWriteGSMTAP(unsigned ARFCN, unsigned TS, unsigned FN,
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GSM::TypeAndOffset to, bool is_saach,
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bool ul_dln, // (pat) This flag means uplink
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const BitVector2& frame,
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unsigned wType) // Defaults to GSMTAP_TYPE_UM
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{
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char buffer[MAX_UDP_LENGTH];
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int ofs = 0;
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// Check if GSMTap is enabled
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if (!gConfig.defines("Control.GSMTAP.TargetIP")) return;
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// Port configuration
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unsigned port = GSMTAP_UDP_PORT; // default port for GSM-TAP
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if (gConfig.defines("Control.GSMTAP.TargetPort"))
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port = gConfig.getNum("Control.GSMTAP.TargetPort");
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// Set socket destination
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GSMTAPSocket.destination(port,gConfig.getStr("Control.GSMTAP.TargetIP").c_str());
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// Decode TypeAndOffset
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uint8_t stype, scn;
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switch (to) {
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case GSM::TDMA_BEACON_BCCH:
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stype = GSMTAP_CHANNEL_BCCH;
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scn = 0;
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break;
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case GSM::TDMA_BEACON_CCCH:
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stype = GSMTAP_CHANNEL_CCCH;
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scn = 0;
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break;
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case GSM::SDCCH_4_0:
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case GSM::SDCCH_4_1:
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case GSM::SDCCH_4_2:
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case GSM::SDCCH_4_3:
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stype = GSMTAP_CHANNEL_SDCCH4;
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scn = to - GSM::SDCCH_4_0;
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break;
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case GSM::SDCCH_8_0:
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case GSM::SDCCH_8_1:
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case GSM::SDCCH_8_2:
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case GSM::SDCCH_8_3:
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case GSM::SDCCH_8_4:
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case GSM::SDCCH_8_5:
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case GSM::SDCCH_8_6:
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case GSM::SDCCH_8_7:
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stype = GSMTAP_CHANNEL_SDCCH8;
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scn = to - GSM::SDCCH_8_0;
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break;
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case GSM::TCHF_0:
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stype = GSMTAP_CHANNEL_TCH_F;
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scn = 0;
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break;
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case GSM::TCHH_0:
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case GSM::TCHH_1:
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stype = GSMTAP_CHANNEL_TCH_H;
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scn = to - GSM::TCHH_0;
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break;
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case GSM::TDMA_PDCH: // packet data traffic logical channel, full speed.
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stype = GSMTAP_CHANNEL_PACCH;
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//stype = GSMTAP_CHANNEL_PDCH;
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scn = 0; // Is this correct?
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break;
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case GSM::TDMA_PTCCH: // packet data timing advance logical channel
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stype = GSMTAP_CHANNEL_PTCCH;
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scn = 0;
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break;
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case GSM::TDMA_PACCH:
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stype = GSMTAP_CHANNEL_PACCH;
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scn = 0;
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break;
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default:
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LOG(NOTICE) << "GSMTAP unsupported type-and-offset " << to;
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stype = GSMTAP_CHANNEL_UNKNOWN;
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scn = 0;
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break;
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}
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if (is_saach)
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stype |= GSMTAP_CHANNEL_ACCH;
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// Flags in ARFCN
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if (gConfig.getNum("GSM.Radio.Band") == 1900)
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ARFCN |= GSMTAP_ARFCN_F_PCS;
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if (ul_dln)
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ARFCN |= GSMTAP_ARFCN_F_UPLINK;
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// Build header
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struct gsmtap_hdr *header = (struct gsmtap_hdr *)buffer;
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header->version = GSMTAP_VERSION;
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header->hdr_len = sizeof(struct gsmtap_hdr) >> 2;
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header->type = wType; //GSMTAP_TYPE_UM;
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header->timeslot = TS;
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header->arfcn = htons(ARFCN);
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header->signal_dbm = 0; /* FIXME */
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header->snr_db = 0; /* FIXME */
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header->frame_number = htonl(FN);
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header->sub_type = stype;
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header->antenna_nr = 0;
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header->sub_slot = scn;
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header->res = 0;
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ofs += sizeof(*header);
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// Add frame data
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frame.pack((unsigned char*)&buffer[ofs]);
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ofs += (frame.size() + 7) >> 3;
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// Write the GSMTAP packet
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GSMTAPSocket.write(buffer, ofs);
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}
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// vim: ts=4 sw=4
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